> I for one am happy to see this, Con. I have been running an earlier patch> as pclos applies it to 2.6.38.8, and I must say the desktop interactivity> is very much improved over the non-bfs version.

I'va always wondered what people are using to measure interactivity. Do we havesome hard numbers from scheduler traces, or is it a "feels faster"? And ifit's a subjective thing, how are people avoiding confirmation bias (where youdecide it feels faster because it's the new kernel and *should* feel faster)?Anybody doing blinded boots, where a random kernel old/new is booted and theuser grades the performance without knowing which one was actually running?

And yes, this can be a real issue - anybody who's been a aysadmin fora while will have at least one story of scheduling an upgrade, scratching itat the last minute, and then having users complain about how the upgraderuined performance and introduced bugs...